In article ,
Mike Tomlinson wrote:
In article , Don Pearce
writes
Back in the olden days there was always a cooker spur rated at 30
amps. That came straight from the fuse board to the cooker, which was
wired into the wall plate without a socket.
Also the immersion, on its own 16A radial. Though sometimes you could
find it wired into a ring.
This was common once, but IIRC regs changed requiring new builds (or
re-wires) to have it on a radial.
IIRC, the concept of a ring requires diversity - ie no continuous high
loads. Most domestic high loads are for fairly short periods of time. But
heating usually more constant. Water heating is sort of in between - hence
the regs changing.
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